Allow for '-o feature@<feature>=disabled' on the command line

Sometimes it is desirable to specifically disable one or several
features directly on the 'zpool create' command line.

$ zpool create -o feature@<feature>=disabled ...

Original-patch-by: Turbo Fredriksson <turbo@bayour.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #3460 
Closes #5142 
Closes #5324

tests/runfiles/linux.run

@@ -250,7 +250,8 @@ tests = [
     'zpool_create_021_pos', 'zpool_create_022_pos', 'zpool_create_023_neg',
     'zpool_create_024_pos',
     'zpool_create_features_001_pos', 'zpool_create_features_002_pos',
-    'zpool_create_features_003_pos', 'zpool_create_features_004_neg']
+    'zpool_create_features_003_pos', 'zpool_create_features_004_neg',
+    'zpool_create_features_005_pos']
 
 # DISABLED:
 # zpool_destroy_001_pos - failure should be investigated

tests/zfs-tests/tests/functional/cli_root/zpool_create/Makefile.am

@@ -30,4 +30,5 @@ dist_pkgdata_SCRIPTS = \
 	zpool_create_features_001_pos.ksh \
 	zpool_create_features_002_pos.ksh \
 	zpool_create_features_003_pos.ksh \
-	zpool_create_features_004_neg.ksh
+	zpool_create_features_004_neg.ksh \
+	zpool_create_features_005_pos.ksh

tests/zfs-tests/tests/functional/cli_root/zpool_create/zpool_create_features_004_neg.ksh

@@ -39,7 +39,7 @@
 verify_runnable "global"
 
 properties="\
-feature@async_destroy=disabled \
+feature@async_destroy=disable \
 feature@async_destroy=active \
 feature@xxx_fake_xxx=enabled \
 unsupported@some_feature=inactive \

tests/zfs-tests/tests/functional/cli_root/zpool_create/zpool_create_features_005_pos.ksh

@@ -0,0 +1,93 @@
+#!/bin/ksh -p
+#
+# CDDL HEADER START
+#
+# The contents of this file are subject to the terms of the
+# Common Development and Distribution License (the "License").
+# You may not use this file except in compliance with the License.
+#
+# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+# or http://www.opensolaris.org/os/licensing.
+# See the License for the specific language governing permissions
+# and limitations under the License.
+#
+# When distributing Covered Code, include this CDDL HEADER in each
+# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+# If applicable, add the following below this CDDL HEADER, with the
+# fields enclosed by brackets "[]" replaced with your own identifying
+# information: Portions Copyright [yyyy] [name of copyright owner]
+#
+# CDDL HEADER END
+#
+
+#
+# Copyright (c) 2012 by Delphix. All rights reserved.
+#
+
+. $STF_SUITE/include/libtest.shlib
+. $STF_SUITE/tests/functional/cli_root/zpool_create/zpool_create.shlib
+
+################################################################################
+#
+# Specifically disabling a feature, all other features should be enabled.
+#
+# 1. Loop through all existing features:
+#    a. Create a new pool with '-o feature@XXX=disabled'.
+#    b. Verify that every other feature is 'enabled' or 'active'.
+#
+################################################################################
+
+verify_runnable "global"
+
+function cleanup
+{
+	datasetexists $TESTPOOL && log_must $ZPOOL destroy $TESTPOOL
+}
+
+function check_features
+{
+	typeset feature="${1}"
+
+	${ZPOOL} get all ${TESTPOOL} | $GREP feature@ | while read line; do
+		set -- $(echo "${line}")
+
+		if [[ "feature@${feature}" == "${2}" ]]; then
+			# Failure passed feature must be disabled.
+			if [[ "${3}" != "disabled" ]]; then
+				return 1;
+			fi
+		else
+			# Failure other features must be enabled or active.
+			if [[ "${3}" != "enabled" && "${3}" != "active" ]]; then
+				return 2;
+			fi
+		fi
+	done
+
+	# All features enabled or active except the expected one.
+	return 0
+}
+
+log_onexit cleanup
+
+# Several representative features are tested to keep the test time short.
+# The features 'extensible_dataset' and 'enabled_txg' are intentionally
+# excluded because other features depend on them.
+set -A features \
+    "hole_birth" \
+    "large_blocks"  \
+    "large_dnode" \
+    "userobj_accounting"
+
+typeset -i i=0
+while (( $i < ${#features[*]} )); do
+	log_assert "'zpool create' creates pools with ${features[i]} disabled"
+
+	log_must $ZPOOL create -f -o "feature@${features[i]}=disabled" \
+	    $TESTPOOL $DISKS
+	log_must check_features "${features[i]}"
+	log_must $ZPOOL destroy -f $TESTPOOL
+	(( i = i+1 ))
+done
+
+log_pass "'zpool create -o feature@feature=disabled' disables features"